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• 22:02, 13 March 2023 Lukegao1 talk contribs created page How to Assay Gold (创建页面，内容为“ Assaying gold is the process of determining its purity or fineness. This is important for many reasons, including valuation, trading, and manufacturing purposes. There are several methods for assaying gold, including fire assay, aqua regia assay, and X-ray fluorescence assay. Here are the steps involved in each method: 1. Fire assay: - Take a small sample of the gold and melt it in a crucible with a flux (usually a mixture of borax and soda ash). - Pour the…”)